#1
I was planning on the Vypyr 15. It does rock and metal very well.

But im not sure if its good at doing softer stuff like The Eagles,Bryan Adams, etc
#2
Most of these modelling amps can't do low gain great. That being said, as an owner of the Vypyr, the low gain stuff does sound pretty good; it's definitely a lot better than the Line 6 Spiders I've played. I say go for it.
#3
i have the cube 15xl. its pretty good. 4 different distortions. no other effects though.
Squier VM 1970s Strat
Squier J5 Gold Frost Telecaster
EVH 5150 LBX2
Peavey Vypyr Vip 1

MIM Fender Precision
#4
i didn't think the lower gain stuff on the vypyr sounded bad at all. i thought both the vypyr and mustang did low gain stuff pretty well.